SF: Introduce VsyncTimeline to VsyncPredictor
Add the concept of timeline freezing when switching render rate.
This allow us to change render rates in sync with the app and remain
jank free across render rate changes.
Bug: 326599221
Test: Run TouchLatency, change render rate and examine Perfetto trace
Change-Id: Ibc8026434c0c1d50138299da3cb110b317604e92
diff --git a/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp b/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp
index d891008..c22deab 100644
--- a/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp
+++ b/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp
@@ -48,7 +48,7 @@
Period minFramePeriod() const final { return Period::fromNs(currentPeriod()); }
void resetModel() final {}
bool needsMoreSamples() const final { return false; }
- bool isVSyncInPhase(nsecs_t, Fps) const final { return false; }
+ bool isVSyncInPhase(nsecs_t, Fps) final { return false; }
void setDisplayModePtr(ftl::NonNull<DisplayModePtr>) final {}
void setRenderRate(Fps) final {}
void onFrameBegin(TimePoint, TimePoint) final {}
@@ -64,7 +64,7 @@
public:
FixedRateIdealStubTracker() : StubTracker{toNs(3ms)} {}
- nsecs_t nextAnticipatedVSyncTimeFrom(nsecs_t timePoint, std::optional<nsecs_t>) const final {
+ nsecs_t nextAnticipatedVSyncTimeFrom(nsecs_t timePoint, std::optional<nsecs_t>) final {
auto const floor = timePoint % mPeriod;
if (floor == 0) {
return timePoint;
@@ -77,7 +77,7 @@
public:
VRRStubTracker(nsecs_t period) : StubTracker(period) {}
- nsecs_t nextAnticipatedVSyncTimeFrom(nsecs_t time_point, std::optional<nsecs_t>) const final {
+ nsecs_t nextAnticipatedVSyncTimeFrom(nsecs_t time_point, std::optional<nsecs_t>) final {
std::lock_guard lock(mMutex);
auto const normalized_to_base = time_point - mBase;
auto const floor = (normalized_to_base) % mPeriod;